/Engine/Plugins/Experimental/VirtualCameraCore/Source/VCamCore/Public/ViewTargetPolicy/GameplayViewTargetPolicy.h
The default implementation sets the view target without a blend. You can override this to do a blend or perform additional actions. Note this is also called when the the owning output provider is deactivated (so you can possibly reset the view target to be the old player controller's pawn).
void UpdateViewTarget ( const [FUpdateViewTargetPolicyParams](API\Plugins\VCamCore\ViewTargetPolicy\FUpdateViewTargetPolicyParams) & Params )